Segment Reporting (Segment Data Schedule) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended	12 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Segment Reporting Information [Line Items]
Net revenues	$ 6,856	$ 6,837	$ 19,103	$ 19,250
Operating income	2,944	2,557	7,899	7,371
Amortization of intangibles	(12)	(20)	(28)	(30)	$ (38)
Corporate asset impairment and exit costs	(1)	2	(74)	(2)
Interest and other debt expense, net	(293)	(159)	(989)	(503)
Net periodic benefit income, excluding service cost	24	21	40	37
Earnings from equity investments	333	189	866	759
Impairment of JUUL equity securities	(4,500)	0	(4,500)	0
Loss on Cronos-related financial instruments	(636)	0	(1,327)	0
Loss on ABI/SABMiller business combination	0	0	0	(33)
Earnings (losses) before income taxes and equity earnings of subsidiaries	(2,128)	2,608	1,989	7,631
Smokeable Products [Member]
Segment Reporting Information [Line Items]
Net revenues	6,049	6,035	16,837	16,995
Smokeless Products [Member]
Segment Reporting Information [Line Items]
Net revenues	620	586	1,762	1,690
Wine [Member]
Segment Reporting Information [Line Items]
Net revenues	167	181	483	489
All Other [Member]
Segment Reporting Information [Line Items]
Net revenues	20	35	21	76
Operating Segments [Member] \| Smokeable Products [Member]
Segment Reporting Information [Line Items]
Operating income	2,561	2,277	6,864	6,516
Corporate asset impairment and exit costs	0	5	(50)	4
Operating Segments [Member] \| Smokeless Products [Member]
Segment Reporting Information [Line Items]
Operating income	417	370	1,195	1,085
Corporate asset impairment and exit costs	(1)	(3)	(9)	(6)
Operating Segments [Member] \| Wine [Member]
Segment Reporting Information [Line Items]
Operating income	16	29	50	73
Operating Segments [Member] \| All Other [Member]
Segment Reporting Information [Line Items]
Operating income	8	(38)	(27)	(121)
Corporate asset impairment and exit costs			(14)	0
Segment Reconciling Items [Member]
Segment Reporting Information [Line Items]
Amortization of intangibles	(12)	(20)	(28)	(30)
General corporate [Member]
Segment Reporting Information [Line Items]
General corporate expenses	(46)	(61)	(154)	(152)
Corporate asset impairment and exit costs	$ 0	$ 0	$ (1)	$ 0

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